Patent US4160459A successfully refreshed from Google Patents.
US4160459A
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US
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Low pour crude oil compositions
Assignee: Texaco Inc
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Filing: 1977-11-23
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Granted: 1979-07-10
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Expires: 1997-11-23
Abstract
Abstract A low pour crude oil composition is prepared by incorporating into a waxy crude oil an effective pour depressant amount of an oil-soluble terpolymer, such as a vinyl acetate-ethylene-methacrylic or acrylic acid ester terpolymer. The terpolymer may be added with mixing directly to the heated crude or in hydrocarbon solution such as a solution of the terpolymer in a middle distillate or kerosene. In another aspect, this invention relates to a process for the pipeline transportation of the low pour point crude oil composition previously described.
Inventors
- 👤 William M. Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:38
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C10L1/197; C10L1/1973; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
53 words
A residual fuel oil composition having improved pour point characteristics comprising a waxy crude oil and an effective pour depressant amount of an oil-soluble terpolymer comprising recurring units of: ##STR4## wherein R" is selected from the group consisting of --CH 3 and hydrogen and n is an integer of from 1 to 5.
Claim 2
Dependent Claim
53 words
A residual fuel oil composition having improved pour point characteristics comprising a waxy crude oil and an effective pour depressant amount of an oil-soluble terpolymer comprising recurring units of: ##STR4## wherein R" is selected from the group consisting of --CH 3 and hydrogen and n is an integer of from 1 to 5.
Claim 3
Dependent Claim
31 words
The composition of claim 1 wherein the said terpolymer comprises about 35 weight percent vinyl acetate, about 13 weight percent units of the formula ##STR5## and with the balance being ethylene.
Claim 4
Dependent Claim
21 words
The composition of claim 1 wherein the amount of the said terpolymer employed is about 0.01 to about 0.50 weight percent.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein the number average molecular weights of the said terpolymers will range from about 5000 to about 85,000.
Claim 6
Dependent Claim
23 words
The composition of claim 1 wherein the number average molecular weights of the said terpolymers will range from about 15,000 to about 50,000.
Claim 7
Dependent Claim
21 words
In the transportation of crude oils, the improvement which comprises introducing into a pipeline the crude oil composition of claim 1.
References Cited (Backward Citations)
US3467597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-09 | 1983-01-08 | 1983-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-09 | 1987-01-08 | 1987-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-09 | 1991-01-08 | 1991-07-10 | $7700.00 | Window Closed / Lapsed |